Landing for pliard@chromium.org: Remove static initializers in v8.

src/log.cc

Index: src/log.cc
===================================================================
--- src/log.cc	(revision 11005)
+++ src/log.cc	(working copy)
@@ -35,6 +35,7 @@
 #include "global-handles.h"
 #include "log.h"
 #include "macro-assembler.h"
+#include "platform.h"
 #include "runtime-profiler.h"
 #include "serialize.h"
 #include "string-stream.h"
@@ -1726,13 +1727,14 @@
   }
 }
 
+// Protects the state below.
+static LazyMutex active_samplers_mutex = LAZY_MUTEX_INITIALIZER;
 
-Mutex* SamplerRegistry::mutex_ = OS::CreateMutex();
 List<Sampler*>* SamplerRegistry::active_samplers_ = NULL;
 
 
 bool SamplerRegistry::IterateActiveSamplers(VisitSampler func, void* param) {
-  ScopedLock lock(mutex_);
+  ScopedLock lock(active_samplers_mutex.Pointer());
   for (int i = 0;
        ActiveSamplersExist() && i < active_samplers_->length();
        ++i) {
@@ -1759,7 +1761,7 @@
 
 void SamplerRegistry::AddActiveSampler(Sampler* sampler) {
   ASSERT(sampler->IsActive());
-  ScopedLock lock(mutex_);
+  ScopedLock lock(active_samplers_mutex.Pointer());
   if (active_samplers_ == NULL) {
     active_samplers_ = new List<Sampler*>;
   } else {
@@ -1771,7 +1773,7 @@
 
 void SamplerRegistry::RemoveActiveSampler(Sampler* sampler) {
   ASSERT(sampler->IsActive());
-  ScopedLock lock(mutex_);
+  ScopedLock lock(active_samplers_mutex.Pointer());
   ASSERT(active_samplers_ != NULL);
   bool removed = active_samplers_->RemoveElement(sampler);
   ASSERT(removed);